Determination of molecular orientation of material surfaces - enables rotation of test-piece under hardness probe for optical projection of indentation profile

摘要

The surface hardness tester comprises an adjustable support table (7a) which allows the test piece to be orientated under the probe (1). By this means a series of hardness readings can be obtained for determination of the molecular structure of anisotropic materials. The support point (7a) is fixed but a supporting table with central aperture aligned directly over the pillar allows the specimen to be moved in all directions. A light source (4) illuminates the point of depression via an infrared filter (3) and fibre optic light guide (2). A lens (8) focusses the profile onto a ground-glass or matt screen.